• Government-Issued Identification (ID)
• Social Insurance Number (SIN)
• Tax information slips* (T5007, T4, T4A, T4E, T2202 etc.)
• Expense Receipts (Rent receipts, medical expenses receipts etc.)
• Previous years Notice of Assessment (if available)

*Tax Information Slips: These are prepared by your employer, payer, or administrator. You should have received most of your slips and receipts by the end of February.
If you have not received your tax slips or have misplaced a slip for the current year, ask for a copy from your employer or the issuer of the slip or call the Canada Revenue Agency's (CRA) general enquiries line 1-800-959-8281 and request a copy be sent to you.

If you need a slip for a previous year, you may be able to get a copy through CRA's online My Account service (if you're registered) or by speaking to a CRA agent at 1–800-959-8281.

For duplicate Old Age Security (OAS), Employment Insurance (EI), and Canada Pension Plan (CPP) slips, you can contact Service Canada on 1-800-206-7218, visit a Service Canada office or check your My Service Canada Account (if you're registered).

Below is a comprehensive list of required documents: